27 Copyright © 2006 ATSG “ 2 0 0 6 ”  S E M I N A R  I N F O R M A T I O N Automatic Transmission Service Group SLIDE HONDA CIVIC & ACCORD REVERSE IDLER GEAR ORIENTATION COMPLAINT: CAUSE: CORRECTION: The reverse idler gear has been installed upside down which makes it difficult to assemble the case halves. If the case halves do go together, the idler gears will not mesh properly. When referring to a repair manual the direction of how the gear is to be installed is unclear. Civics and Accords three shaft design with four cylinder engines use a reverse idler gear that has to face in a correct direction. The gear shown in Figure 1 for the Civic has a small inverted ‘v’ groove on one side. This “v” groove faces the end cover, away from the converter. The gear shown in Figure 2 is for the Accord and is larger in diameter then the Civic gear. It  also  has  an  inverted  “v”  groove  which  must  also  face  the  rear  cover,  away  from  the converter. The measurements shown in Figure 2 should also aid in determining in which direction the gear must be installed. Notice the center hub on the ACCORD  gear is higher on one side than the other which creates an offset configuration.

28 Copyright © 2006 ATSG “ 2 0 0 6 ”  S E M I N A R  I N F O R M A T I O N Automatic Transmission Service Group SLIDE RIDGE FACES END COVER CIVIC REVERSE GEAR BOTH SURFACES ARE FLUSH Figure 1 BOTH SURFACES ARE FLUSH THE “INVERTED “V” NOTCH SHOULD FACE TOWARDS THE REAR COVER TO AVOID GEAR NOISE DUE TO ALREADY ESTABLISHED WEAR PATTERNS. INVERTED “V” NOTCH = INNER & OUTER SURFACES ARE FLUSH

29 Dimension “A” = .045” Dimension “B” = .040” Copyright © 2006 ATSG “ 2 0 0 6 ”  S E M I N A R  I N F O R M A T I O N Automatic Transmission Service Group SLIDE ACCORD REVERSE GEAR .045” HIGHER THAN OUTER GEAR SURFACE RIDGE FACES END COVER RECESSED .040” LOWER THAN OUTER GEAR SURFACE INVERTED “V” NOTCH Figure 2 CORRECTED DIMENSIONS “A” AND “B”